S46 may refer to:
Submarines
* , of the Royal Navy
* , of the Indian Navy
* , of the United States Navy
Other uses
*
S46 (Berlin)
The Berlin S-Bahn line 46 (S46) runs from Königs Wusterhausen to Westend. It operates over:
*the Görlitz line, opened in 1866 and electrified in 1929,
*the Baumschulenweg–Neukölln link line, opened on 8 June 1896 and electrified in 1928 ...
, a line of the Berlin S-Bahn
*
S46 (New York City bus), serving Staten Island
*
Blériot-SPAD S.46, a French biplane airliner
*
Explorer S-46 (satellite), a failed American spacecraft
*
GER Class S46, a British steam locomotive
*
Parti Melayu Semangat 46, a defunct political party in Malaysia
*
S46: If swallowed, seek medical advice immediately and show this container or label, a safety phrase
*
SABCA S-46, a Belgian aircraft
*
Sulfur-46, an isotope of sulfur
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